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Interferometer Scanning?

Posted by Wissing 
Interferometer Scanning?
August 26, 2013 07:28PM
Has anyone ever heard of using an interferometer to judge a wide range of distances?

I was thinking trying to make one that simply tracks motion (not absolute distance) by counting the number of times a red laser flits from red to black as it scans across an object.

Has it been done? Is it feasible? Anyone know what I'm talking about?

Re: Interferometer Scanning?
August 27, 2013 02:28AM
... AFAIK there were/are many big companies, 3D-scanning vibrating surfaces of cars and planes with interferometry ... but this changed recently to structured light-scanning with DLP-beamers for simpler handling and cheaper equipment ...

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